Knife and scissors sharpener.



PATENTED JUNE 9, 1908.

M. L. HAWKS. KNIFE AND SGISSORS SHA'RPENBR.

IIIIIII APPLIGATION FILED FEB. 3, 180B- WITNESSES Tn: Halli PITIRI cm, WAlHlIImII, u. c.

MOSES. L. HAWKS, OF NEW YORK, N. Y.

KNIFE AND SCISSORS 'SHARPENER.

Specification of Letters Patent.

Patented June 9, 1908.

Application filed February 3, 1908. Serial No. 414,067.

"use the same.

This invention relates to devices for sharpening knives, scissors and similar articles, and particularly to devices of this class in which hardened metal sharpening bars or files are employed; and the object of the said invention is to provide an improved device of this class which is simple in construction, effective in operation and comparatively inexpensive, and which may be easily and con-' Veniently manipulated by anyone without previous experience; a further object being to provide a device of the class specified by means of which a true flat bevel and a thin sharp cutting edge may be produced on knives, scissors or similar articles.

The invention is an improvement on that described and claimed in United States Letters Patent granted to me March 6, 1900, No. 644,708, and is fully disclosed in the following specification, of which the accompanying drawin forms a part, in which the separate parts 0% my improvement are designated by suitable reference characters in each of the views, and in which Figure 1 is a front view of my improved shar ening device; Fig. 2 a cross section on the ine 22 of Fig. 1; and, Fig. 3 a back view of the head portion of the device as shown in Fig. 1.

In the practice of my invention, I provide a yoke-shaped device a with the closed end portion of which is connected a handle a and the yoke-shaped device 0 consists of two spring side members or arms a having projecting aws a which are parallel or substantially so. The jaws a and their connected parts form the head portion of the sharpening device and said jaws are provided at the back of said head portion and at their adjacent edges with inwardly directed ears or projections a which are arranged in pairs as clearly shown in Fig. 3, and between the jaws a is placed, in practice, a bar or file b which is triangular in cross section and the separate corners of which are provided with fine cutting edges. 'A clamp 0, open at one side, is mounted on the jaws a, and said jaws are wider at their outer than at their inner ends, and said clamp is movable longitudinally on said jaws and the bar or file b is held in place bythe ears or projections of and the clamp c, the said clamp and the said ears or projections forming a triangular space or spaces in which said file or bar is securely locked. The angles of the ears or projections a is the same as the angle formed by a cross section of one corner portion of the bar or file b as clearly shown in Fig. 2, and when said bar or file is placed in position longitudinally of and between the jaws a, it rests between the ears or projections c and is locked in this position by the clamp c. The

side members or arms a of the yoke a form,-

in connection with the inner end portion of the bar or file b, V-shaped recesses d through which, in practice, the blade to be sharpened is passed with the edge of said blade directed outwardly, and by drawing or forcing said blade throu h said recesses, in either or both directions, t e required edge may be quickly and easily formed thereon. It will also be observed that there are V-shaped recesses d between the outer end portions of the jaws a and the corresponding end portion of the file or bar I) and a blade may be passed through these recesses with the edge thereof directed inwardly, and by moving said blade back and forth through said recesses, the required edge may be quickly and easily formed thereon.

In using this device, the handle a should be grasped firmly in one hand and the head portion thereof supported on any suitable support and the blade to be sharpened is grasped by the other hand and manipulated as hereinbefore described by passing it through the recesses d or d at the inner end of the bar or file b and at the outer end thereof. It will also be understood that the clamp 0 may be loosened at any time by moving it inwardly, or in the direction of the yoke-shaped device a, and the file or bar I) may be removed and its position reversed, or it may be turned, and the edges thereof may be sharpened when desired, or a new file or bar may be substituted for the old one whenever desired.

My invention is not limited to the formation and use of the recesses 01 and d at the Opposite ends of the jaws a and the file or bar I), and said recesses may be employed only at one end of said jaws and the corre sponding end of said file or bar if desired.

It will be observed that the jaws a are tapered on their outer edges toward the outer ends thereof and the movement of the open clamp c in the direction of said outer ends will cause said jaws to firmly grasp and hold the file or bar I) while the movement of said clamp in the opposite direction will release said file or bar, and this movement of said clamp may be effected by means of a small hammer or in any other preferred way.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is

1. A sharpening device of the class de scribed, comprising a yoke-shaped frame provided at its closed end with a handle and the sides of which are composed of spring mate rial and converge toward their free ends and. are provided with parallel jaws, said jaws being also rovided at their adjacent faces with laterally extending and converging ears or projections, a file or bar having oppositely arran ed cutting edges and adapted to be place between said jaws and supported thereby and by said ears or projections, and a clamp mounted on said jaws and adapted to be moved longitudinally thereon so as to lock said file or bar between said jaws, the converging side members of the yoke-shaped frame and the inner end of the file or bar forming opposite V-shaped recesses.

2. A sharpening device of the class described, comprising a yoke-shaped frame provided at its closed end with a handle and the sides of which are composed of spring material and converge toward their free ends and are provided with parallel jaws, said jaws being also rovided at their adjacent faces with laterally extending and converging ears or projections, a file or bar having oppositely arranged cutting edges and adapted to be placed between said jaws and supported thereby and by said ears or projections, and a clamp mounted on said jaws and adapted to be moved longitudinally thereon so as to lock said file or bar between said jaws, the converging side members of the yoke-sha ed frame and the inner end of the file or ar forming opposite V-shaped recesses, and the adjacent faces of said jaws at their outer ends being divergent so as to form in connection j with said file or bar other V-shaped recesses.

In testimony that I claim the foregoing as my invention I have signed my name in presence of the subscribing witnesses this first day of February, 1908.

MOSES L. HAWKS.

Witnesses:

W. W. OANFIELD, C. E. MULREANY. 

